html,
body,
.checkbox,
.checkbox .inner,
.checkbox .inner .toggle {
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
}

body {
	background-color: darkseagreen;
}

.checkbox {
	width: 10em;
	height: 5em;
	background: linear-gradient(silver, whitesmoke);
	border-radius: 2.5em;
	font-size: 40px;
}

.checkbox .inner {
	width: 8em;
	height: 3.5em;
	background: linear-gradient(dimgray, silver);
	border-radius: 2em;
	box-shadow: inset 0 0 1.5em rgba(0, 0, 0, 0.5);
}

.checkbox .inner .toggle {
	width: 3.5em;
	height: 3.5em;
	background: linear-gradient(to top, silver, whitesmoke);
	border-radius: 50%;
	box-shadow: 0 0.4em 0.6em rgba(0, 0, 0, 0.2);
	position: relative;
	left: -30%;
	transition: 0.5s;
}

.checkbox .inner .toggle::before {
	content: 'OFF';
	position: absolute;
	width: 80%;
	height: 80%;
	background: linear-gradient(silver, whitesmoke);
	border-radius: 50%;
	text-align: center;
	line-height: calc(3.5em * 0.8);
	font-family: sans-serif;
	color: gray;
}

.checkbox .inner.active {
	background: linear-gradient(green, limegreen);
}

.checkbox .inner.active .toggle {
	left: 30%;
}

.checkbox .inner.active .toggle::before {
	content: 'ON';
	color: limegreen;
}
